Precision computation of the strange quark's mass in quenched QCD

被引：122

作者：

Garden, J ^{[1
]}

Heitger, J

Sommer, R

Wittig, H

机构：

[1] Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] DESY, Zeuthen, D-15738 Zeuthen, Germany

[3] Univ Oxford, Oxford OX1 3NP, England

[4] Univ Tsukuba, Ctr Computat Phys, Tsukuba, Ibaraki 3058571, Japan

来源：

NUCLEAR PHYSICS B | 2000年 / 571卷 / 1-2期

基金：

英国工程与自然科学研究理事会;

关键词：

quark masses; lattice gauge theory; chiral perturbation theory; non-perturbative renormalization; quantum chromodynamics; Monte Carlo;

D O I：

10.1016/S0550-3213(99)00714-2

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We determine the renormalization group invariant quark mass corresponding to the sum of the strange and the average light quark mass in the quenched approximation of QCD, using as essential input the mass of the K-mesons. In the continuum limit we find (M-s + (M) over cap)/F-K = 0.874(29), which includes systematic errors. Translating this non-perturbative result into the running quark masses in the (M) over bar (S) over bar scheme at mu = 2 GeV and using the quark mass ratios from chiral perturbation theory, we obtain (m) over bar(s)(2 GeV) = 97(4)MeV. With the help of recent results by the CP-PACS Collaboration, we estimate that a 10% higher value would be obtained if one replaced F-K by the nucleon mass to set the scale. This is a typical ambiguity in the quenched approximation. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：237 / 256

页数：20

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